During campaign stops in St. Louis and Cleveland, Ohio, on Saturday, Clinton accused Trump of "political arson."

Advertisement

"The ugly, divisive rhetoric we are hearing from Donald Trump and the encouragement of violence and aggression is wrong," she said. "If you play with matches, you're going to start a fire you can't control."

Democratic candidate Bernie Sanders said it's up to Trump to stop the violent outbursts at his campaign rallies.

Republican candidate John Kasich said he's had it with the "toxic" nature of Trump's campaign.